Nematology , 2000, Vol. 2(8), 871-879 Evaluation of Trichoderma virens and Burkholderia cepacia for antagonistic activity against root-knot nematode, Meloidogyne incognita Susan L.F. M EYER 1 ; ¤ , Samia I. M ASSOUD 2 , David J. C HITWOOD 1 and Daniel P. R OBERTS 3 1 USDA, ARS, Nematology Laboratory, Bldg. 011A, Rm. 165B, BARC-West, 10300 Baltimore Avenue, Beltsville, MD 20705-2350,USA 2 Faculty of Agriculture, Botany Department, Suez Canal University, Ismailia, Egypt 3 USDA, ARS, Biocontrol of Plant Diseases Laboratory, Bldg. 011A, Rm. 275, BARC-West, 10300 Baltimore Avenue, Beltsville, MD 20705-2350, USA Accepted for publication: 28 July 2000 Summary – The bacterium Burkholderia cepacia (strain Bc-2) and the fungus Trichoderma virens (strain Gl-3) were investigated for activity against the nematode Meloidogyne incognita . Culture ltrates from Bc-2 and Gl-3 contained extracellular factors that inhibited egg hatch and second-stage juvenile (J2) mobility. Size fractionation results and lack of detectable chitinase or protease activities from Bc-2 and Gl-3 culture ltrates suggested that the inhibitory factors in the in vitro assays were non-enzymic. Tomato root explant cultures of M. incognita treated with T. virens culture ltrate had 42% fewer eggs and J2 per g of roots than
Nematology – Brill
Published: Jan 1, 2000
Keywords: LYCOPERSICON; BACTERIA; BIOLOGICAL CONTROL; ESCULENTUM; TOMATO; NATURAL PRODUCTS
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